Thx for the reply.
I'm using ./configure --enable-packetver=20151104 on server-side.
Client-side I have clientinfo.xml with <version>55</version>
Nothing on server's console, just pings to SQL server to keep the connection alive. Seems like the login requisition is not even getting to login-server.
I'm almost sure there's something wrong about my client.
I've tried following a lot of guides, but they do not explain anything. I've studied MySQL before, that's why I'm pretty sure the problem is not there.
I've tried running the server on Windows and Linux, localhost and remote, even tried Hamachi. I don't know what to do anymore.
Note: now running on Linux with all necessary ports free and ready to use.